function Mail() {
};

Mail.instance = function() {
  return { trackId: MiscUtils.unique(),
           createdDate: SimpleDate.create(),
           sdate: SimpleDate.create(),
           rdate: SimpleDate.create(),
           number: '',
           company: '',
           weight: 0,
           recipient: '',
           destination: '',
           comment: '',
           produces: []
         }
};
